Machine for making extension-joints for rollers.



No. 689,928. Patented Dec. 3!, 'I90l. w. SPARROW & N. P. NELSON. MACHINE-FOB MAKING EXTENSION JUINTS FUR ROLLERS (Application filed Feb. 18, 1901.)

(No Model.) 2 Sheets-Sheet I.

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N0. 689,928. Patented Dec. 3|, I90l.

W. SPARROW & N. P.'NELSON. MACHINE FOR MAKING EXTENSION JOINTS FOR ROLLERS.

(Application filed Feb. 13, 1901.) (No Model.) 2 Sheets-Sheet 2.

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WILLIAM SPARROTV AND NELS PETER NELSON, OF BAY CITY, MICHIGAN, ASSIGNORS TO THE MICHIGAN SHADE ROLLER AND BOX COMPANY, OF BAY CITY, MICHIGAN.

MACHINE FOR MAKING EXTENSlON-JOlNTS FOR ROLLERS.

sFECIFIGATION forming part of Letters Patent No. 689,928, dated December 31, 1901.

Application filed February 18,1901. Serial No- 4'7,100- (N model.)

To [0 Lu/tom it may concern: tion roller 3 The friction -roller and its Be it known that we, TVILLIAM SPARROW shaft can be adjusted vertically to regulate and NELS PETER NELSON, citizens of the theintensity of driving pressure. Below the United States, residing at Bay City, in the friction-roller and parallel with it is placed 5 county of Bayand State of Michigan, have ina pair of horizontal spindles 4 and 4. These vented certain new and useful Improvements spindles are carried by bearings 55, fixed to in Machines for Making Extension-Joints for the base 1. The friction-roller 3 drives the Rollers; and we dohereby declare the followhorizontal spindles & and 1 and is itself ing to be a full, clear, and exact description driven by a belt 6, which passes around the to of the invention, such as will enable others main driving-pulley 7. 6o

skilled in the art to which it appertains to To the forward end of each of the horizonmake and use the same. tal spindles is secured a hollow cylinder-saw This invention is a machine for making eX- S 8, by which the joint of the roller is shaped. tension-joints for curtaiu-rollers, dad, and is The two saws cut sinmltaneously as the roller :3 especially adapted for making the class of is advanced lengthwise upon them, and the 6 joints shown in Patent No. 668,063, issued to length of cut is regulated by a stop 1, selVilliam Sparrow February 14, 1901. cured to the base 1. The backward thrust of The improvements consist in certain novel the saws 8 and S is taken by washers 9 and constructions and arrangements of cutting 9, which bear against the ends of thespinzo mechanism and means for driving it. dles 4t and 1 and are adjustably held in place One object of our invention is to produce a by set-bolts. In front of the cylinder-saws machine which shall be compact, simple in are arranged two guides 10 and 11 for holdconstruction and arranged to form cylindricing the roller in alinement with the saws. ally concaved or convened tongues on the These guides consist of brackets fastened to 25 ends of wooden cylinders or rollers. the base 1, having their upper ends bored to A further object is to provide a simple receive removable bushings 10 and 11 of guiding device for centering the roller and various internal diameters to suit rollers of means for varying the intensity of pressure different sizes. The bushing of the back on the driving-gear. guide 1l-the one nearest the saws-is pref- 30 The invention is illustrated in the accomerably cylindrical; but the bushing of the panying drawings, throughout the several front guide is semicylindrical, so that the views of which similar characters of referrollers can be easily placed and removed. ence designate corresponding parts. The intensity of pressure of the friction- Figure 1 is a top view of the machine. Fig. roller 3 upon the horizontal spindles can be 35 2 is a side'elevation showing the frame partly varied as desired by turning the set-screws 8: in section. Fig. 3 is a perspective detail of 12, the lower ends of which bear upon the the guide for centering the rollers, showing vertically-movable journal-boxes 13, carryone of the removable bushings by which it is ing the shaft of the friction-wheel. The belt adapted to suitdifferent-sized rollers. Fig. t b, which is preferably wide, passes through 0 is an end View of the machine. Fig. 5 is a holes in the base 1 on each side of the spine top view of the cylinder-saws and their spindles and serves as a covering to protect their dles. Fig. (5 is a perspective view of a sawed rubbing surfaces. This belt may be tightroller. Fig. 7 is an end view of the friction ened and theintensityof pressure of the fricdriving-gear. Fig. 8 is a diagrammatic view lion-roller 3 upon the friction-surfaces of the 4.5 showing the way in which opposite members saw-spindles may be increased or decreased of a joint are sawed. by vertically adj usling the shaft of the driv- As is clearly shown in the drawings, the ing-pulley 7 in the adjustable journal-boxes machine consists in a base 1, carrying a pair 14:. Thus an additional means for varying of standards 2, between the upper ends of the driving pressure of the friction-roller is 50 which is journaled a shaft 3, carrying a fricprovided. 10a

The distance between the saws is made to suit the thickness of web desired for the double concaved tongue of the completed joint.

It is obvious that if the opposite ends of a joint are cut by the same pair of saws they will when put together have a clearance between them equal to the thickness of the sawkerf. In order to make a tight joint, two pairs of saws are preferably used, the inside kerf diameter of one pair being equal to the outside kerf diameter of the other pair. With this arrangement one member of the extension-joint is cut on one pair of saws and the other member is cut on the second pair. When these two members are put together, they form a perfect-fitting joint.

The middle part of the two-tongued member is severed from the roller by means of chisels that cut from the outer surface of the roller into the center. In like manner the side parts of the sin gle-tongued member are severed by chisels that out from the outer surface of the roller inwardly to the'ooncaved surfaces of the tongue. I

What we claim as our invention, and desire to secure by Letters Patent, is as follows:

1. Means for shaping the faces of a joint for rollers and the like consisting in a pair of cylinder-saws arranged side by side for shaping the cylindrically-concaved faces of the joint; and a second pair of saws arranged side by side for shaping the cylindrioally-oonvexed faces of the joint; the inside kerf diameter of the saws comprising the first pair being equal to the outside kerf diameter of the saws of the other pair.

2. Means for shaping the cylindrically-concaved and cylindrically-convexed faces of a joint for rollers and the like consisting in a pair of parallel cylindersaws arranged to sever one member of the roller-joint lengthwise with two oppositely-curved arc-shaped saw-cuts, one on each side of the axis of the roller; and ase'cond pair of parallel cylindersaws for similarly severing the other member of the joint, the inside kerf diameter of one pair of saws being equal to the outside kerf diameter of the other pair of saws,wherel)y a tight joint is formed when the two members are telescoped.

3. Two parallel cylinder-saws mounted on parallel shafts carrying cylindrical frictionsurfaces, together with a single friction-roller engaging each of said shafts to actuate the adjacent edges of the saws simultaneously in opposite directions.

7 4;. Two parallel cylinder-saws mounted on parallel shafts carrying cylindrical frictionsurfaces, together with a single friction-roller of larger diameter than said friction-surfaces engaging each of said surfaces; having means for varying its pressure upon said surfaces and arranged to drive the shafts and saws simultaneously, substantially as described.

5. Two parallel cylinder-saws mounted on parallel shafts rotatingin fixed bearings and carrying cylindrical friction-surfaces, in combination with a single friction-roller of larger diameter than said friction-surfaces, said roller engaging both of said surfaces and mounted in journal-boxes adjustable by setscrews to vary the pressure of the roller upon said surfaces, together with a belt passing around the friction-roller and outside the friction-surfaces of the shafts.

6. In a machine for shaping the cylindrical faces of an extension-joint for rollers and the like, the combination with a base; of a pair of standards supported by said base and carrying vertically-adj ustable journal-boxes havinga friction-roller mounted therein; of apair of parallel horizontal spindles mounted in fixed journal-boxes below the friction-roller and adapted to be driven by contact therewith; of horizontallyadjustable thrust-bearings engaging the rear ends of said spindles; of screw-threads formed on the front ends of said spindles; a pair of hollow cylinder-saws screwed to said threads; a guide-bracket in front of said saws, carrying a removable cylindrical bushing; a second guide-bracket in front of the first bracket, carrying a semicylindrical removable bushing; and means, substantially as described for driving the friction-roller. v

7. In a machine for shaping the cylindrical faces of an extension-joint for rollers and the like, the combination of a frame carrying a driving pulley; a base mounted on said frame; standards carried by said base; vertically-adjustable journal-boxes secured in said standards and carrying a friction-roller; a belt passing over the friction-roller and driving-pulley; a pair of parallel horizontal spindles below the friction-roller and contacting therewith; parallel cylinder-saws secured to one end of the spindles; thrust-bearings at the other end of the spindles; centeringguides in front of said saws and arranged to guide a roller along the center-line between said saws, substantially as described.

In testimony whereof we affix our signatures in presence of two witnesses.

WILLIAM SPARROWV. NELS PETER NELSON.

\Vitnesses:

GEO. B. WILLOOX, WILLIAM STEPHENS.

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